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Publication: Owen, R. E., K. W. Richards, and A. Wilkes. 1995. Chromosome numbers and Karyotypic Variation in Bumble Bees (Hymenoptera: Apidae; Bombini). Journal of the Kansas Entomological Society, vol. 68, no. 3. 290-302.

ITIS records citing this publication
 
 Kingdom Animalia
  Bombus citrinus (Smith, 1854) -- valid
  Bombus occidentalis Greene, 1858 -- valid
  Bombus pennsylvanicus (De Geer, 1773) -- invalid
   

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